758 



PRINCIPLES OF SOIL MICROBIOLOGY 



The fact that fungi grow readily on soils subjected to dry or moist 

 heat 66 would tend to add further weight to this idea. The abundant 



O — « — Bacteria 



• Bacteria* Amoebae 



Bacteria* flagellates 



3 4 5 6 7 8 15 16 17 U 

 Kumlicr of days .aftci inoculation 



Fig. 70. Action of protozoa upon the development of bacteria (from Cutler) 



growth of fungi in soils treated with disinfectants, after a certain period 

 has elapsed, is also quite marked. Figures 70 and 71 show that 



66 Seaver and Clark, 1912 (p. 749). 



